Had a first happen yesterday. Another cyclist and I rode together for 2 miles on the morning commute. Turned out we had been introduced at a social function some time back. It was really different and very enjoyable to have someone to chat with on the ride. I know it sounds silly to those who see dozens of cyclist on every commute, but there are very few days I see anyone other than myself commuting. Some sport riders in full kit occasionally, and that's about it. They are usually going the other direction so I don't have a chance to "scalp" 'em the way Joey does!